Remote control hoist



May 19, 1931. D R I 1,805,482

REMOTE CONTROL 1101 ST Filed Dec. 26, 1928 2 Shets-Sheet 1 INVE NTOR May 19 1931. J. v. DYRR 1,805,482

REMOTE CONTROL HOIS'I Filed Dec. 26. 1928 2 Sheets-Sheet 2 F224, 6 Z 63 4 23 24 43' 43 46 I 42 32 44 47 4 INVENTOR 5 Jam]; VI DYRR QW Q W Wrruzss'. Q7

Patented May 19; 1931 JAGOB v. mans on snnnn, oA InonmA 3mm: CONTR HOIST a ease-meleeDecember as, 1928. Serial No. 328,515.

An object o'f this invention is -lto provide :a hoist thatthe operator can control from any distance with-in, or, out of, sight 1 of :the hoist machinery so' that he need not 'diver't 5 his attention to suchiinachineny bntnan fconistantly watch the loatl and {place it exactly 'W'hen'eit should be placed. i

' A further 'oh"ect is "to enable the "operator during such operationfto perfe'etly control so the hoist by the useo only one {hand at- "a time meanwhile leaving his feet free ito 'sup port his hody, and I also leaning the operator free to move about While he is swinging the load in'to an'd is placing it in, the exact' posi, tiendesired. V i

' An advantage of the inyention i's that it enables onewonkmanalona'and Witl'IO'u-tHIly a ssistance from i a "helper, to place art stones c and other fini shing parts exactly where a e- ,20 q i d I r- 1 1 TlIB iIIVQIItiOII includesthe combination with a shaft provided "with a nnrmally mleased clutch and with normally set brak'e',

of "independent means winder the 'eontrol of the operator to c ause engagement of the clutch; andindependentineansunderzth e com ,trol of the operator to release the brakel I Am objetot the invention "is to makefth hoist perfectly safe for inexperienced opera tors, and this is effected by automatically holding the load witha'bnake *at all times except when released byoperationoffthe control line therefor. T

2 v This invention is hroadlyfinew'fibasicand' pioneer'in that :provisionis mad'e for two independent line controls so "tha't 'hy leading both lines to any desired placeftheopfe'fator stationed at that place can operate -the two 40 lines independently of each other so as lto exactly place theload. n o p Another advantage is that-a workman can 7 attach the load to the *hoistiline and ithen go to the control station on a scaffold :o'rielsewhere and handle the loadwithoutAarhelpen,

thus making possible for one man to --do a job thatjheretofore required a man and ;a

helper. c

The invention includes the "hoist, :andi-cparts and combinations 'ofparts going toa-m'akeaup the same and tnioie panticnlanly hereinafter v described. I c v V a Fhoist iis ofithe 1 class-operable by a motor constantly running in one direction, "as

fan electric motor 501' an internal combustion xen-gineuof common type, and will-be shown herein i as'iconnected-"to be operated by such an eng'me K V c- J KLQther objects, advantages and :features of invention may appear from theaccompanying clrawings, the snlijoined 'det'ailed descniptioniandathe appended claims I ti'o'n' showing the clutch inset position.

1 Fig."ffi is a detached :view of "clutchiopierating cams.

F' gt ifiiis a :fa e "view of shownin-Fi'g. '5. 1 i a Fig. 7 ii'si'a frag nental sectional viewon'line m7, Fig..2,fshowing the form of guide'th'rough which 'the'l l ine is fexten ded from t'heh'oistQ p iEig;-i8 is pan elevation of the hoist rmechani'sm in ioperativeposition looking to the'lle'ft the clutch member Zing hto theiri 'ghtsiniFig. 1, from the control station indi'catedrby the derrick in broken 1i'ne's.-'

5 Fig. 95s a diagrammatic side elevation of the hoist in the position :shown in Fig. :1; brokenilines indicate. a "derrick on a iscaflold and iaiwh'eelbarrow as a load loeing fhoisted.

:Fig."loiisiaihagmental elevation fromthe v bnake-sifdeg-rtlrat is to' say, from i the left :side

r 'rielatiyetmthe hoist shown in Fig 1, and 7.1

o ting the fenfginei'an'dlthe hoist andcontrolling ilines isho'wn in Fig; :1.

= Fig,l 8iisa tragmenta1Fside elevation IOf'ihe :bmke control shownin "Fig. 2. v

Fig. 4 is airagmentalplan partly incsec 180 one of the of Fig. 8; the engine is omitted and a fragment of the clutch driving sprocket chain is shown.

Fig. 11 is a vertical sectional detail of the brake lever connection on line all, Fig. 10.

Fig. 12 is an enlarged side elevation of a malleable castiron purchase forming part of the brake control lever and its immediate connection together with fragments of the brake band terminals.

Fig. 13 is an elevation of the clutch side of the hoist.

Fig. 14 is a plan detail of what is shown in Fig. 12.

The frame as shown is constructed of two channel iron sills, an engine plate, and cross bars. The channel iron sills 1, 2, are secured together by the steel engine plate 3 which is fixed to the top flanges of the sills by bolts or rivets 4 at the rear end of the frame. The cross bars 5 and (rare respectively secured to the bottom and top flanges of the channel iron sills. The lower flanges of the channel iron sills are secured by suitable means to sleepers 7 and 8.

9 is an angle iron brake-band stop support secured to the top flanges of the sillsas 1 indicated at 10, and a set screw is mounted thereon to limit the retraction of the steel spring brake band 12 of common form having a slotted front end 13 and a threaded rear end The resiliency of the brake band tends to release the brake and is normally overcome by a brake control lever that is illustrated in Figs. 10, 11 and 12 as made up of a steel lever bar 15 and a malleable cast iron purchase 16 fixedto the bar 15 by bolts 17 and provided with a fulcrum bearing 18 and also provided on opposite sides of the bearing with a slotted attachment arm 19 for the threadedend, and a lug 20 for the slotted end of the'brake band. A nut a on the threaded end, and a cotter pin 5 on the lug, secure said ends to the purchase. I

The lever 15 is fulcrumed to the frame by a pin 21 and its front end is connected to a spring 22 supported by a bolt 23 carried by a bracket 24 fixed to the channel-ironsill 2 of the hoist frame and adjustable by the nut 25 to regulate the normal brake setting action. The spring is shown provided with a hook 26 to engage the front end of the lever 15. The channel-iron sill 2 is provided with a hole to form a seat 0 for the pin fixed to the sill 2 by nuts 27, 28; while the outer end of the pin 21 is reduced as at 29 and the brake control lever is secured thereto by a cotter pin 30. The weight of the lever extension on one side of the fulcrum pin 29, together with the upward tension of the spring 22, normally contracts the brake band on the brake drum 31 that is journalled to the Windlass shaft 32 to which the ratchet wheel 33 is fixed'by the key 34, and is held by pawls 35 from revolving backwards to unwind the Windlass 32 which is fixed to the Windlass shaft 32 as by the key 32".

The pawls 35 pivoted by pivots 36 to the brake drum are normally held in catching position by the compression springs 37. v The steel brake band 12 is provided with the usual composition friction shoe 38 and is normally held in brake setting position by the downward pressure of the lever extenson 15 and the upward pressure of the contractile spring 22. The free end of the lever extension 15 is provided with a line 39 by which the free end of the brake control lever 15 can be drawn up, thus expanding the brake band, and releasing the brake. While the brake is set, the brake drum is held stationary and the Windlass shaft 32 and windlass 32' are prevented from revolving in the direction indicated by the single-barb arrow.

The power shaft 40 is provided with a spur pinion 41 that is fixed to said shaft 40 and meshes with a Windlass driving spur gear 42 that is fixed to the Windlass shaft 32 which is j ournalled at 43, 43' to the channel-iron sills 1 and 2 ofthe frame.

The power shaft 40 is provided with a clutch plate 44 that is fixed thereto by a pin 45 inposition to be engaged by the clutch disc 46 which is provided with the composition clutch facing 46 and is journalled on the power shaft 40 and is slidable along the said shaft 40 by a shifting device consisting of a cam collar 47 journalled by ball bearings 47' on the power shaft 40 and fixed to a clutch control lever 48 and constantly engaged with a complementary cam collar 49 that is journalled on the power shaft with ball bearings 49' and held in fixed relation to the hoist frame 50 by annextension arm 50 which is slidably mounted at 51 on a sill 1 of the frame. 1

A spring cushion 52 positioned between adjusting nut 53 and the slidable complementary cam collar 49, is adapted to receive the thrust of the cam collar when the clutch cams are, engaged by a slight movement of the clutch control line 39 to close the clutch. 55 is a grease cup communicating through the channel 55 to deliver oil to an oil hole 56 to lubricate the shifting clutch.

The clutch control lever 48 is normally depressed by its own weight to allow the clutch to run free. The clutch control line 54 is attached to the free end of the clutch control lever 48 and is led through a stationary eye 57 to the place of control.

The lines 39 and 54 are led to the operators station which may be at any place where the operator can observe the Work, for instance, on the surface of the ground as at 58, or in a tunnel, or on a platform, not shown, or on a scaffold 59; and when he does not pull either line, the engine 60 with its sprocket (51, runs freely without affecting the hoist, and

the drum 32 stands still, and a load r62,if

suspended by the hoist line 68, will notdescend until the brake control line is tightened and the brake is thus released.

If the operator wants to pull or liftra load,"

he will pull line 54to shift the clutch into acsprocket chain 62 or the control line 54 should break, the engine may. continue to run, but the load will be held-stationary because the brake is set and the pawls 35 prevent the drum shaft from revolving until the operator pulls upon the brake control line 39, thus releasing the brake and allowing the drum to revolve. The brake may be released to a greater or less extent, depending upon the extent to which the lever is lifted; and if the line 39 should break, the spring 22' and the gravity of the lever extension 15 would immediately set the brake p Windlass shaft-to revolve thewindlassr; a

Ibra ke'wheel fixed .to :the windla ss shaft;

andfstop the load. 7 V

In practical use for'placing art stones in walls, the derrick 63 will be stationed on a platform or elsewhere that will serve as a support for the operator and the art stone car'- ried by the Windlass line 6 lwill beunder the control of the operator to swing the art stone in a horizontal plane without any attention being paid to the hoist controlling lines, and if it is found that the art stone is slightly higher or lower than the required level, the operator may pull upon the line 54, gently shifting the clutch just sufficiently to lift the art stone to the required level; or if the art stone is too high, he can pull on the line 39 just enough to release the brake sufliciently to lower the art stone the distance required.

It is thus seen that I have provided the hoist with frictional means in the form of thebrakc on one side of the hoist frame controlled by a line, and have provided the hoist on the 0pposite side with a friction clutch and means for COIItIOllIH the same. a The clutch s automatioally held out of operation by the gravity of its lever and thesp'ringmeans, so that,

lifting operations cease automatically, and

descent is prevented automatically and his only by the lifting of one or the other lever,

that the hoist becomes active either for moving the load or holding it stationary.

I claim j 1. In a hoist, the combination of apower shaft provided with a normally releasedclutch; ratchetmeans; a Windlass driven by the power shaft through the ratchet means and in one direction only; a normally set brake to hold the Windlass; independent means-under the control of an operator to cause engagement of the clutch; and independent means under the control of the op erator to release the brake.

2.. The combination with a Windlass and a' 1 power shaft, :of gearingconnetctingztlrewind ilass i and: power shaft to drive the Windlass tinually-revolve'the driven clutch memberiin one direction only; a :transmitting clutch member fiXQ'Gl'tO thG powershaft; means to shift the 'drivenclutch member into and out of engagement with the transmitting clutch 7 member; a win'dlass shaft journalled to revolve'; a drum fixed to the Windlass ishaft; .a hoist line fixed'to and wound on the drum; gearing connecting the :power shaft with the "means to normally prevent revolution of the Windlass sh'a ftvin one direction relative to thefibrake wheel and to allow such relative revolution in th'e opposite direction; means to normallyholcl': the brake wheel ,stationoperary 'antl ineansunder the control of an ator to release thebrake wheel.

r 4. A power shaft journalled to revolve; a transmitting clutch member .fiXed to the power shaft to revolve'therewith; a clutch member journalled on and slidable along the power shaft and provided with sprocket "teeth; a motor; a sprocket chain connecting the motor with the sprocket teeth to revolve the slidable" clutch member; a cam memberjournalled on the power shaft and adapted to slide the sliding clutch member toward the transmitting clutch member; a lever connected to the camto' operate the same; a line connected to the cam lever to? operate such lever, said lever being adapted to normally hold the cam in clutch releasing position; a

wvindlass shaft; adrum fixed to the Windlass shaft; gearing driven by the power shaft to revolve the windlass shaft in one direction; a brake wheel revolvable on the Windlass shaft; means connecting the brake wheel with the Windlass shaft to allow rotation of the brake wheel and relative to the Windlass shaft in-one direction only; a brake band for, and

normally free from, the brake wheel; a brake a lever adapted to operate the brake band to contract the same and arranged so that the weight ,of the clever will normally contract the brake band onto the brake wheel; and a line connected to the brake lever and adapted to lift the sameto release the brake.

5. In a hoist comprising a Windlass; a hoist line connected to the windlass and adapted to turn it in one direction;'means to revolve the Windlass to wind the hoist line thereonto; a brake wheel; means connecting the brake wheel and Windlass to allow relative rotation of wheel and Windlass in one direction only;

a fulcrum pin; a brake band for the brake wheel; a brake lever fulcrumed on the pin and provided with projections on opposite sides of the pin, the ends of the brake band being connected to the projections respectively; a spring support for one arm of the brake lever, the other arm of said lever being overbalanced to descend by gravity to contract the brake band onto the brake wheel; and an operating line connected to the lever to cooperate with the spring to move the lever to release the brake band.

6. A hoist comprising a frame; a Windlass journa-lled to the frame; Windlass controlling mechanism including a clutch and an overbalanced lever for operating the clutch; a brake wheel revolvable in one direction relative to the Windlass; a brake band for said brake wheel; an overbalanced lever to normally hold the brake band in braking position; and lines leading from an operators station to the levers respectively to lift the same independently of each other.

In testimony whereof I have hereunto set my hand at Los Angeles, California, this 4th day of December 1928.

JACOB V. DYRR 

